Last year I did three matching tables for a friend in oak. Two roughly 20" x 26" and one 31" x 47". The two end tables were lacated over heat registers in the floor and have the most seperation at the glue joints. I used standard Tightbond series 1 and biscuits but they are still shrinking. Any tips would be greatly appreciated. The photos ahow them unfinished but the general construction is 4 to 6 four inch boards edge glued together and a 3 inch board on each end tounge and groove glued perpindicular to the others.